ISL12057 Datasheet, PDF (6/17 Pages) Intersil Corporation – Low Cost and Low Power I2C RTC Real Time Clock/Calendar

ISL12057
SDA vs SCL Timing
t_F
t_HIGH
t_LOW
t_R
SCL
t_SU:STA
SDA
(INPUT TIMING)
SDA
(OUTPUT TIMING)
t_SU:DAT
t_HD:STA
t_HD:DAT
t_AA
t_DH
Symbol Table
WAVEFORM
INPUTS
Must be steady
OUTPUTS
Will be steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Don’t Care:
Changes Allowed
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not Known
N/A
Center Line is
High Impedance
t_SU:STO
t_BUF
EQUIVALENT AC OUTPUT LOAD CIRCUIT FOR V_DD = 5V
5.0V
SDA,
IRQ1/F_OUT
AND
IRQ2
1533Ω
FOR V_OL= 0.4V
AND I_OL = 3mA
100pF
FIGURE 1. STANDARD OUTPUT LOAD FOR TESTING THE
DEVICE WITH V_DD = 5.0V
6
FN6755.0
June 15, 2009